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Old 01-25-2022, 08:12 PM   #1
Mini-Skoolie
 
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Unhappy My 8.3l vibration damper woes and general Cummins info

I'm looking for manuals or help from people that have access to Cummins info. I've got a FE 2001 BB with an 8.3l cummins. I've got an oil leak somewhere on the front of the engine. I'm thinking main seal or something around that. I've got the rad and intercooler out and the 4 bolts mounting the fan to the fan clutch. Here lies my problem vibration damper bolts are locked on tighter than a nun's knickers. I've tried 25 inch breaker bar with extension, 3 separate impact guns to no avail. I haven't heated them up yet.. I'm thinking there might be lock tite on them. My question is what thread direction are they. I thought they are right hand thread. My 5.9l cummins is. The second thing giving me the same grief is the fan clutch grade 10.9, 16mm bolt. I'm pretty sure this is left hand threads. Help with suggestions or first hand knowledge of these would be appreciated.
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Old 01-26-2022, 11:02 AM   #2
Mini-Skoolie
 
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I did find a manual digging through the Skoolie archives. It was a shared link to a Google drive. 900 plus page manual. My four bolts should be torqued to 140ftlbs and the are right hand thread(regular). Which means mine must have locktite on them. Couldn't find info on the single 16mm grade 10.9 bolt holding my fan clutch on.

From Jay-Z thread

https://drive.google.com/file/d/1zvt...w?usp=drivesdk
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Old 01-26-2022, 11:12 AM   #3
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Glad to see you found it. I saw your initial post a few minutes ago but I can't help with info on that engine.

Hopefully someone with experience with that engine will come along to comment on your other questions.
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Old 01-26-2022, 02:33 PM   #4
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is there room to get a bottle jack under your breaker bar and cheater?
putting heat on it is taking a chance of messing it up.
and the heat needs to be on the metal housing that is actually threaded.
a trick i have used if you need to go the heat route.
get a can of air duster heat up the metal around the bolt threads until good and hot and then spray the bolt heads good with the air duster and then try to pull the bolt the air duster actually blows cold air and shrinks the bolt while heating the thread casing expands it.
just some idea?
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Old 01-26-2022, 05:13 PM   #5
Mini-Skoolie
 
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Quote:
Originally Posted by Jolly Roger bus 223 View Post
is there room to get a bottle jack under your breaker bar and cheater?
putting heat on it is taking a chance of messing it up.
and the heat needs to be on the metal housing that is actually threaded.
a trick i have used if you need to go the heat route.
get a can of air duster heat up the metal around the bolt threads until good and hot and then spray the bolt heads good with the air duster and then try to pull the bolt the air duster actually blows cold air and shrinks the bolt while heating the thread casing expands it.
just some idea?
I have thought bottle jack route that'll be what I do after I try some heat. I appreciate the input.
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Old 01-27-2022, 08:56 PM   #6
Mini-Skoolie
 
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Chassis: Bluebird A3 FE 8400
Engine: 8.3l cummins
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Update: All bolts were right hand thread. Got them all off with a combo of heat, bottle jack, and lots of leverage. I appreciate the ideas Jolly Roger bus 223. I might have used my legs and a 36 inch breaker bar at times too.
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Old 02-05-2022, 10:12 PM   #7
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Quote:
Originally Posted by Jolly Roger bus 223 View Post
is there room to get a bottle jack under your breaker bar and cheater?
putting heat on it is taking a chance of messing it up.
and the heat needs to be on the metal housing that is actually threaded.
a trick i have used if you need to go the heat route.
get a can of air duster heat up the metal around the bolt threads until good and hot and then spray the bolt heads good with the air duster and then try to pull the bolt the air duster actually blows cold air and shrinks the bolt while heating the thread casing expands it.
just some idea?



AIR DUSTER? I always used dry ice
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Old 02-07-2022, 12:58 AM   #8
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Do some harmonic balancers use a rubber insert?
Would heat from a torch be counter-productive?
As in 'melting then blazing a melting smoky inferno'?
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